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Cosmetic compositions containing at least one flavonoid and ferulic acid

Active Publication Date: 2014-04-17
LOREAL SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent is about a new type of skin care product that contains flavonoids and ferulic acid in a specific ratio to produce a synergistic antioxidant effect. The product can also contain other antioxidants and additional ingredients like hydrotropes, caffeine, or nicotinamide. When applied to the skin, the product can help protect against free radicals and other harmful substances that can damage the skin.

Problems solved by technology

The damaging effects of these reactive oxygen species are induced internally during normal metabolism and externally through various oxidative stresses.
None of these patents teach the synergistic effect between phenolic compounds themselves.
None of these patents teach the synergistic effects between phenol / polyphenol compounds that are used in cosmetic formulations.

Method used

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  • Cosmetic compositions containing at least one flavonoid and ferulic acid

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0048]To test samples by using ORAC, compounds are dissolved into water-based NaH2PO4 buffer. Therefore, usually only hydrophilic compounds can be tested in this assay. Although the required concentration is very low in the assay and certain organic solvents such as ethanol or acetone can be used to help solubilization, there is still some issue for certain compounds with very limited solubility. Here, by using hydrotropes, clear water-based solutions could be prepared for antioxidant associations. These solutions were used to test the ORAC of different associations. The hydrotropes used, caffeine and nicotinamide, have been tested both individually and in solution to make sure that they have no influence on the capacity of antioxidant compounds.

[0049]All the antioxidants selected for association design show potent capacity in ORAC assay, while hydrotropes which just been used to increase the solubility of certain antioxidants have no capacity by themselves. The results of individua...

example 2

Preparation A: Serum

[0053]

PhaseComponentWeight % of totalAPropylene glycol10ADipropylene glycol10AEthanol10AFerulic acid0.5ABaicalin0.4BWater49BVitamin C10BCaffeine5BNicotinamide5BBaicalin0.1

[0054]Preparation A is made as follows using the above listed components.

[0055]The glycol phase (Phase A) components were mixed together at 65° C. except ethanol. After obtained a clear solution and cooled it down to room temperature, ethanol was added. At the same time, the aqueous phase (Phase B) components were mixed at room temperature till clear solution was obtained. The glycol phase was then added into the aqueous phase with constant stirring for another 1 hour and the desired serum was obtained. The final PH was adjusted to 4.5 by using NaOH.

example 3

Preparation B: Cream

[0056]

PhaseComponentWeight % of totalA1Water57.5A1Nicotinamide5A1Caffeine5A1Baicalin0.5A1Resveratrol0.5A1Ferulic acid0.5A2Glycerin10A2Xanthan gum0.2A2Preservatives1BDicaprylyl carbonate3BDimethicone3BDicapryl alcohol and ceteareth-204BGlyceryl stearate and PEG-1004.5stearateCDimethicone ammonium4CPolyacryloyldimethyl taurate0.3DNylon-121

[0057]Preparation B is made as follows using the above listed components.

[0058]Phase A1 components were mixed at room temperature in sequence until a clear solution was obtained. In separate containers, Phase A2 was pre-suspended, and then added into Phase A1 with constant stirring and heated to 65° C. At the same time, Phase B components were mixed and completely dissolved at 65° C. Then Phase B was added into Phase A and emulsified for 10-15 minutes. Heating was then stopped, and mixing continued. Phase C was added and mixed for another 10 minutes. After the temperature fell below 40° C. Phase D was added and mix for 10-15 minut...

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Abstract

The invention provides synergistic aqueous compositions comprising at least one flavonoid, and ferulic acid, and optionally one or more additional antioxidants, for cosmetic use.

Description

FIELD OF THE INVENTION[0001]The present invention relates to aqueous compositions comprising at least one flavonoid, and ferulic acid, and optionally one or more additional antioxidants, for cosmetic use.BACKGROUND OF THE INVENTION[0002]The formation of free radicals is a widely accepted pivotal mechanism leading to skin aging. Free radicals are highly reactive molecules with unpaired electrons that can directly damage various cellular membranes, lipids, proteins, RNA and DNA. The damaging effects of these reactive oxygen species are induced internally during normal metabolism and externally through various oxidative stresses. UV exposure and environmental pollution can accelerate skin aging by producing free radicals in skin.[0003]Antioxidants protect cells from the damage of oxidative stress by scavenging free radicals and inhibiting following oxidation reactions. The topical application of antioxidants is broadly used in skin care product to prevent skin aging.[0004]Previously, i...

Claims

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Application Information

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IPC IPC(8): A61K8/60A61Q19/08A61K8/49
CPCA61K8/365A61K8/498A61K2800/522A61K8/347A61K8/676A61Q19/08A61P39/06A61K8/675A61K8/36A61K8/494A61K47/22A61K47/10A61K8/602
Inventor PAN, ZHISIMONNET, JEAN-THIERRYMURTAUGH, ASHLEIGHSPOMER, JAMIE IANNACONE
Owner LOREAL SA
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